<template>
    <div>
       <!-- 面包屑导航 -->
        <el-breadcrumb separator="/">
        <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
        <el-breadcrumb-item>商品管理</el-breadcrumb-item>
        <el-breadcrumb-item>商品列表</el-breadcrumb-item>
        </el-breadcrumb>
        
        <!-- 卡片视图 -->
        <el-card>
            <el-row :gutter="20"> 
                <!-- 输入框查询按钮 -->
                <el-col :span="8">
                    <el-input placeholder="请输入内容" v-model="queryInfo.query" clearable @clear="getGoodsList">
                        <el-button slot="append" icon="el-icon-search" 
                        @click="getGoodsList"></el-button>
                    </el-input>
                </el-col>
                <!-- 与添加商品按钮 -->
                <el-col :span="4">
                    <el-button type="primary" @click="goAddPage">添加商品</el-button>
                </el-col>
            </el-row>
            
            
            <!-- table表格区域 -->
            <el-table :data="goodslist" border stripe>
                <el-table-column type="index"></el-table-column>
                <el-table-column prop="goods_name" label="商品名称"></el-table-column>
                <el-table-column prop="goods_price" label="商品价格(元)" width="95px"></el-table-column>
                <el-table-column prop="goods_weight" label="商品重量" width="70px"></el-table-column>
                <el-table-column prop="add_time" label="创建时间" width="150px">
                    <template slot-scope="scope">
                        {{scope.row.add_time | dataFormat}}
                    </template>
                </el-table-column>
                <el-table-column label="操作" width="130px">
                    <template slot-scope="scope">
                        <!-- 编辑按钮 -->
                        <el-button type="primary" icon="el-icon-edit" size="mini"
                       ></el-button>
                        <!-- 删除按钮 -->
                        <el-button type="danger" icon="el-icon-delete" 
                        size="mini" @click="removeById(scope.row.goods_id)"></el-button>
                    </template>
                </el-table-column>
            </el-table>
            
            <!-- 分页功能 -->
            <el-pagination
                @size-change="handleSizeChange"
                @current-change="handleCurrentChange"
                :current-page="queryInfo.pagenum"
                :page-sizes="[5, 10, 15, 20]"
                :page-size="queryInfo.pagesize"
                layout="total, sizes, prev, pager, next, jumper"
                :total="total" background>
            </el-pagination>
        </el-card>
    </div>
</template>
<script>
export default {
    data(){
        return{
            // 查询参数对象
            queryInfo:{
                query:'',
                pagenum:1,
                pagesize:10
            },
            // 商品列表数组
            goodslist:[],
            // 总数据条数
            total:0
        }
    },
    created(){
        this.getGoodsList()
    },
    methods:{
        //根据分页获取相应的数据列表
        async getGoodsList(){
            const {data:res} = await this.$http.get('goods',{params:this.queryInfo})
            if(res.meta.status!==200){
                return this.$message.error('商品列表获取失败！')
            }
            // this.$message.success('商品列表获取成功！')
            // 获取商品列表
            this.goodslist = res.data.goods
            // console.log(this.goodslist);
            this.total = res.data.total
        },
        
        //获取一页数据大小 
        handleSizeChange(newSize){
            this.queryInfo.pagesize = newSize
            this.getGoodsList()
        },
        // 获取当前页是那一页
        handleCurrentChange(newPage){
            this.queryInfo.pagenum = newPage
            this.getGoodsList()
        },
        // 通过ID删除商品信息
        async removeById(id){
            const confirmResult = await this.$confirm('此操作将永久删除该商品, 是否继续?', '提示', {
            confirmButtonText: '确定',
            cancelButtonText: '取消',
            type: 'warning'
            }).catch(err =>err)
            if(confirmResult!=='confirm'){
                return this.$message.info('已经取消删除！')
            }
            
            const { data :res } = await this.$http.delete(`goods/${id}`)
            if(res.meta.status !==200){
                return this.$message.error('删除失败!')
            }
            // 提示成功
            this.$message.success('删除成功！')
            // 重新获取商品数据
            this.getGoodsList()
        },
        // 展示添加商品页面
        goAddPage(){
            this.$router.push('/goods/add')
        }
        
    }    
}
</script>
<style lang="less" scoped>
    
</style>
